Disc brake backing plates

[Muscle Car Appraisal]

Need help with front disc brake backing plates. In search of NOS or PROPER reproduction pieces. Every repo piece I have seen (did I say every piece!) has the hole where the lower control tip comes through cut incorrectly. They are not cut "square". I know it's more of a rectangle than a square but the point is that one of the vertical cuts is canted rather then straight and when you turn full lock, or close to it, the backing plate hits the control arm and scratches the paint. The original GM part numbers that I am working with are 5463566 and 565. Any help is appreciated. Thank you! As a last resort, I'll work with what I have. What have others done to make them look day one?